微信支付的SDK与DEMO（java）如何跑起来
解决方法:
有时候微信开发的时候下载下来的SDK与DEMO跑不起来，有的类缺失等等问题，可以参考项目下README.md文件，但按照里面很多东西都报错。现在我结合myeclipse总结一下。
1.下载SDK与DEMO（java）：
https://pay.weixin.qq.com/wiki/doc/api/native.php?chapter=11_1
2.导入到myeclipse中，import—》选择Existing Maven Project，SDK与DEMO是java项目不是web项目。
3.在com.github.wxpay.sdk包下新建一个名字为MyConfig.java的类，实现WXPayConfig.java，再新建一个类WXPayDomainSimpleImpl.java（再复制以下内容进去）
4.在src/test/java中新建一个WXPayExample.java测试类，实现统一下单，参数要配置自己的。
MyConfig.java：
package com.github.wxpay.sdk;
import com.github.wxpay.sdk.IWXPayDomain;
import com.github.wxpay.sdk.WXPayConfig;
import java.io.*;
public class MyConfig extends WXPayConfig{
private byte[] certData;
public MyConfig() throws Exception {
//不是沙箱环境要要下载证书，开出来
/*String certPath = "/path/to/apiclient_cert.p12";
File file = new File(certPath);
InputStream certStream = new FileInputStream(file);
this.certData = new byte[(int) file.length()];
certStream.read(this.certData);
certStream.close();*/
}
public String getAppID() {
return "wx238afc7b441c060c";
}
public String getMchID() {
return "12888888";
}
public String getKey() {
return "88888888888888888888888888888888";
}
public InputStream getCertStream() {
ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
return certBis;
}
public int getHttpConnectTimeoutMs() {
return 8000;
}
public int getHttpReadTimeoutMs() {
return 10000;
}
@Override
IWXPayDomain getWXPayDomain() {
// TODO Auto-generated method stub
return WXPayDomainSimpleImpl.instance();
}
}
WXPayDomainSimpleImpl.java：
package com.github.wxpay.sdk;
import org.apache.http.conn.ConnectTimeoutException;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;
/**
* Created by blaketang on 2017/6/16.
*/
public class WXPayDomainSimpleImpl implements IWXPayDomain {
private WXPayDomainSimpleImpl(){}
private static class WxpayDomainHolder{
private static IWXPayDomain holder = new WXPayDomainSimpleImpl();
}
public static IWXPayDomain instance(){
return WxpayDomainHolder.holder;
}
public synchronized void report(final String domain, long elapsedTimeMillis, final Exception ex) {
DomainStatics info = domainData.get(domain);
if(info == null){
info = new DomainStatics(domain);
domainData.put(domain, info);
}
if(ex == null){ //success
if(info.succCount >= 2){ //continue succ, clear error count
info.connectTimeoutCount = info.dnsErrorCount = info.otherErrorCount = 0;
}else{
++info.succCount;
}
}else if(ex instanceof ConnectTimeoutException){
info.succCount = info.dnsErrorCount = 0;
++info.connectTimeoutCount;
}else if(ex instanceof UnknownHostException){
info.succCount = 0;
++info.dnsErrorCount;
}else{
info.succCount = 0;
++info.otherErrorCount;
}
}
public synchronized DomainInfo getDomain(final WXPayConfig config) {
DomainStatics primaryDomain = domainData.get(WXPayConstants.DOMAIN_API);
if(primaryDomain == null ||
primaryDomain.isGood()) {
return new DomainInfo(WXPayConstants.DOMAIN_API, true);
}
long now = System.currentTimeMillis();
if(switchToAlternateDomainTime == 0){ //first switch
switchToAlternateDomainTime = now;
return new DomainInfo(WXPayConstants.DOMAIN_API2, false);
}else if(now - switchToAlternateDomainTime < MIN_SWITCH_PRIMARY_MSEC){
DomainStatics alternateDomain = domainData.get(WXPayConstants.DOMAIN_API2);
if(alternateDomain == null ||
alternateDomain.isGood() ||
alternateDomain.badCount() < primaryDomain.badCount()){
return new DomainInfo(WXPayConstants.DOMAIN_API2, false);
}else{
return new DomainInfo(WXPayConstants.DOMAIN_API, true);
}
}else{ //force switch back
switchToAlternateDomainTime = 0;
primaryDomain.resetCount();
DomainStatics alternateDomain = domainData.get(WXPayConstants.DOMAIN_API2);
if(alternateDomain != null)
alternateDomain.resetCount();
return new DomainInfo(WXPayConstants.DOMAIN_API, true);
}
}
static class DomainStatics {
final String domain;
int succCount = 0;
int connectTimeoutCount = 0;
int dnsErrorCount =0;
int otherErrorCount = 0;
DomainStatics(String domain) {
this.domain = domain;
}
void resetCount(){
succCount = connectTimeoutCount = dnsErrorCount = otherErrorCount = 0;
}
boolean isGood(){ return connectTimeoutCount <= 2 && dnsErrorCount <= 2; }
int badCount(){
return connectTimeoutCount + dnsErrorCount * 5 + otherErrorCount / 4;
}
}
private final int MIN_SWITCH_PRIMARY_MSEC = 3 * 60 * 1000; //3 minutes
private long switchToAlternateDomainTime = 0;
private Map<String, DomainStatics> domainData = new HashMap<String, DomainStatics>();
}
WXPayExample.java
import java.util.HashMap;
import java.util.Map;
import com.github.wxpay.sdk.MyConfig;
import com.github.wxpay.sdk.WXPay;
import com.github.wxpay.sdk.WXPayConfig;
public class WXPayExample {
public static void main(String[] args) throws Exception {
MyConfig config = new MyConfig();
//WXPay wxpay = new WXPay(config);//正式
WXPay wxpay = new WXPay(config,"http://yayihouse.com",false,true);//沙箱
Map<String, String> data = new HashMap<String, String>();
data.put("body", "腾讯充值中心-QQ会员充值");//商品描述
data.put("out_trade_no", "2016090910595900000012");//商户订单号
data.put("device_info", "");//设备号，PC网页或公众号内支付可以传"WEB"
data.put("fee_type", "CNY");//标价币种，默认人民币：CNY
data.put("total_fee", "1");//标价金额，单位为分，
data.put("spbill_create_ip", "123.12.12.123");//APP和网页支付提交用户端ip，Native支付填调用微信支付API的机器IP
data.put("notify_url", "http://www.example.com/wxpay/notify");//异步接收微信支付结果通知的回调地址，通知url必须为外网可访问的url，不能携带参数。
data.put("trade_type", "NATIVE"); //交易类型 JSAPI：公众号支付，NATIVE：扫码支付，APP：APP支付 此处指定为扫码支付
data.put("product_id", "12");//trade_type=NATIVE时（即扫码支付），此参数必传。此参数为二维码中包含的商品ID，商户自行定义。
try {
Map<String, String> resp = wxpay.unifiedOrder(data);
System.out.println(resp);
} catch (Exception e) {
e.printStackTrace();
}
}
}
本文链接：http://yayihouse.com/yayishuwu/chapter/1448